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Study Finds A Lack Of Adequate Hydration Among The Elderly | NEWS-Line for Healthcare Professionals

Study Finds A Lack Of Adequate Hydration Among The Elderly


Drinking enough water is a concern for everyone, but the elderly are particularly prone to underhydration and dehydration. A new UCLA School of Nursing study shows that these conditions are likely to be under-recognized, bringing on health problems ranging from urinary tract infections to frequent falls.

It is estimated that up to 40% of community-dwelling elderly people may be chronically underhydrated, which can lead to more severe dehydration and ultimately life-threatening infections and other health problems. Currently, dehydration accounts for a five percent increase in preventable emergency room visits between 2008 and 2012, and adults older than 65 have the highest hospital admission rates for dehydration, according to the Agency for Healthcare Research and Quality

One significant problem with determining hydration status among elderly people, however, is the lack of a “gold standard” method for measuring hydration. Janet Mentes, professor of nursing at UCLA, found one measure — salivary osmolality — that she and her team tested to evaluate if it could be used by health providers to determine hydration status in older adults.

Salivary osmolality, which compares the ratio of water to certain chemicals naturally in saliva, can be measured using an osmometer. The device is a simple, noninvasive instrument that requires a sample about the same volume as a teardrop. Salivary osmolality is becoming a reliable tool for determining underhydration and dehydration.

The study, published in the journal SAGE Open Nursing, involved taking urine samples from 53 adults at two senior centers and one adult day care center in Los Angeles two times a day, one day a week over a three-week period. By measuring salivary osmolality, Mentes and her team found that elderly participants overall had higher osmolality (indicating greater dehydration) than younger adults, and osmolality was higher during morning hours than it was in the afternoon. Osmolality also was higher among seniors with limited mobility.

In surveying study participants, Mentes’ team also found that significant psychological barriers, including a fear of overnight incontinence, were one of the biggest reasons for early morning osmolality changes.

“So many health issues are related to inadequate hydration,” Mentes said. “The most closely linked are urinary tract infections. Many seniors are underhydrated for a period of time, and when they are exposed to a virus or bacteria they are more likely to develop an infection, such as urinary tract infections, pneumonia or other respiratory diseases. And they will be treated for the infection, but the underlying underhydration will not be recognized. Thus, an opportunity to educate the individual about adequate fluid intake is missed.” She added that underhydration in the morning can result in falls.

One unusual result that Mentes’ team found was lower osmolality among African-Americans, who have traditionally been more likely to be hospitalized for dehydration than Caucasian adults. In this study, African-American participants had a salivary osmolality significantly lower than Caucasian participants, which would indicate less severe hydration problems, not more. Further research on hydration among African-Americans will be necessary to better understand these results.

Other study colleagues include Michelle Devost, with the Los Angeles LGBT Center, and Karabi Nandy, with the University of North Texas Health Science Center in Fort Worth, both formerly at UCLA.

Source:UCLA School of Nursing

Photo Credit:halfpoint/istock.com

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